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Exomoons are expected to orbit gas giant exoplanets just as moons orbit solar system planets. Tidal heating is present in solar system satellites and it can heat up their interior depending on their orbital and interior properties. We aim…

Earth and Planetary Astrophysics · Physics 2023-07-12 E. Kleisioti , D. Dirkx , M. Rovira-Navarro , M. A. Kenworthy

We report the results of a spectroscopic search for debris disks surrounding 41 nearby solar type stars, including 8 planet-bearing stars, using the {\it Spitzer Space Telescope}. With accurate relative photometry using the Infrared…

Fomalhaut plays an important role in the study of debris disks and small bodies in other planetary systems. The proximity and luminosity of the star make key features of its debris, like the water ice-line, accessible. Here we present ALMA…

Earth and Planetary Astrophysics · Physics 2016-02-17 Kate Y. L. Su , George H. Rieke , Denis Defrere , Kuo-Song Wang , Shih-Ping Lai , David J. Wilner , Rik van Lieshout , Chin-Fei Lee

Planetesimal belts are ubiquitous around nearby stars, and their spatial properties hold crucial information for planetesimal and planet formation models. We present resolved dust observations of 74 planetary systems as part of the REsolved…

We present sub-millimeter and mid-infrared images of the circumstellar disk around the nearby F2V star eta Corvi. The disk is resolved at 850um with a size of ~100AU. At 450um the emission is found to be extended at all position angles,…

Astrophysics · Physics 2009-11-10 M. C. Wyatt , J. S. Greaves , W. R. F. Dent , I. M. Coulson

60% of the A star members of the 12 Myr old beta Pictoris moving group (BPMG) show significant excess emission in the mid-infrared, several million years after the proto-planetary disk is thought to disperse. Theoretical models suggest this…

Astrophysics · Physics 2009-11-13 R. Smith , L. J. Churcher , M. C. Wyatt , M. M. Moerchen , C. M. Telesco

CW Eri is a detached eclipsing binary system of two F-type stars with an orbital period of 2.728 d. Light curves from two sectors of observations with the Transiting Exoplanet Survey Satellite (TESS) and previously published radial velocity…

Solar and Stellar Astrophysics · Physics 2024-01-25 Stephen Overall , John Southworth

The GGD27 complex includes the HH 80-81-80N system, which is one of the most powerful molecular outflows associated with a high mass star-forming region observed up to now. This outflow is powered by the star associated with the source IRAS…

Solar and Stellar Astrophysics · Physics 2015-05-20 M. Fernández-López , S. Curiel , J. M. Girart , P. T. P. Ho , N. Patel , Y. Gomez

The Sun and >15 percent of nearby stars are surrounded by dusty debris disks that must be collisionally replenished by asteroids and comets, as the dust would otherwise be depleted on <10 Myr timescales (ref. 1). Theoretical studies show…

Astrophysics · Physics 2009-11-13 Paul Kalas , James R. Graham , Mark Clampin

We report on the first nulling interferometric observations with the Large Binocular Telescope Interferometer (LBTI), resolving the N' band (9.81 - 12.41 um) emission around the nearby main-sequence star eta Crv (F2V, 1-2 Gyr). The measured…

We present analyses of observations of epsilon Eridani (K2 V) made with the Low Energy Transmission Grating Spectrometer on Chandra and the Extreme Ultraviolet Explorer, supplemented by observations made with the Space Telescope Imaging…

Astrophysics · Physics 2009-11-13 J. -U. Ness , C. Jordan

The $\textit{Herschel}$ DEBRIS, DUNES and GT programmes observed 37 exoplanet host stars within 25 pc at 70, 100 and 160 $\mu$m with the sensitivity to detect far-infrared excess emission at flux density levels only an order of magnitude…

In order to study exoplanets, a comprehensive characterization of the fundamental properties of the host stars, such as angular diameter, temperature, luminosity, and age, is essential, as the formation and evolution of exoplanets are…

Earth and Planetary Astrophysics · Physics 2024-09-19 Ashley Elliott , Tabetha Boyajian , Tyler Ellis , Kaspar von Braun , Andrew W. Mann , Gail Schaefer

Extrasolar debris disks are the dust disks found around nearby main sequence stars arising from the break-up of asteroids and comets orbiting the stars. Far-IR surveys (e.g., with Herschel) showed that ~20% of stars host detectable dust…

Earth and Planetary Astrophysics · Physics 2020-01-22 Mark C. Wyatt

The presence of dusty debris around main sequence stars denotes the existence of planetary systems. Such debris disks are often identified by the presence of excess continuum emission at infrared and (sub-)millimetre wavelengths, with…

Earth and Planetary Astrophysics · Physics 2019-01-23 Jonathan P. Marshall , S. T. Maddison , E. Thilliez , B. C. Matthews , D. J. Wilner , J. S. Greaves , W. S. Holland

We have observed Centaurus A with the MID-infrared Interferometric instrument (MIDI) at the Very Large Telescope Interferometer (VLTI) at resolutions of 7 - 15 mas (at 12.5 micron) and filled gaps in the (u,v) coverage in comparison to…

Cosmology and Nongalactic Astrophysics · Physics 2010-10-18 Leonard Burtscher , Klaus Meisenheimer , Walter Jaffe , Konrad R. W. Tristram , Huub J. A. Röttgering

Some solar-type stars are known to present faint, time-variable radio continuum emission whose nature is not clearly established. We report on Jansky Very Large Array observations of the nearby star $\epsilon$ Eridani at 10.0 and 33.0 GHz.…

Solar and Stellar Astrophysics · Physics 2023-10-25 Luis F. Rodriguez , Susana Lizano , Jorge Canto , Ricardo F. Gonzalez

Debris disks are the intrinsic by-products of the star and planet formation processes. Most likely due to instrumental limitations and their natural faintness, little is known about debris disks around low-mass stars, especially when it…

High-precision interferometric observations of six early-type main sequence stars known to harbour cold debris discs have been obtained in the near-infrared K band with the FLUOR instrument at the CHARA Array. The measured squared…